Tire Designations - Chevrolet 2011 Corvette Owner's Manual

10-62 Vehicle Care
(D) Tire Identification Number
(TIN) The letters and numbers
:
following DOT code are the Tire
Identification Number (TIN). The
TIN shows the manufacturer and
plant code, tire size, and date
the tire was manufactured.
The TIN is molded onto both
sides of the tire, although only
one side may have the date of
manufacture.
(E) Tire Ply Material
:
of cord and number of plies in
the sidewall and under the tread.
(F) Uniform Tire Quality
Grading (UTQG) Tire
:
manufacturers are required
to grade tires based on three
performance factors: treadwear,
traction and temperature
resistance. For more information
see Uniform Tire Quality
Grading on page 10 76.
(G) Maximum Cold Inflation
Load Limit
that can be carried and the
maximum pressure needed to
support that load.

Tire Designations

Tire Size
The following illustration shows
an example of a typical
passenger vehicle tire size.
The type
(A) Passenger (P Metric) Tire
The United States version of
a metric tire sizing system. The
letter P as the first character in
the tire size means a passenger
vehicle tire engineered to
standards set by the U.S.
Tire and Rim Association.
Maximum load
:
:
(B) Tire Width The three digit
:
number indicates the tire section
width in millimeters from
sidewall to sidewall.
(C) Aspect Ratio A two digit
:
number that indicates the tire
height to width measurements.
For example, if the tire size
aspect ratio is 60, as shown in
item C of the illustration, it would
mean that the tire's sidewall is
60 percent as high as it is wide.
(D) Construction Code
letter code is used to indicate
the type of ply construction in
the tire. The letter R means
radial ply construction; the
letter D means diagonal or
bias ply construction; and the
letter B means belted bias ply
construction.
A
: